Machine



UNITED STATES PATENT OFFICE.

TIIADDEUS A. JACKSON, OF NEV YORK, N. Y.

STONE-SAWING MACHINE.

SPECIFICATION forming part of Letters Patent No. 410,419, datedSeptember 3, 1889. Application filed September 3, 1888. Serial No.284,911. (No model.)

To all whom it may concern:

Be it known that I, THADDEUS A. J AUKSON, a citizen of the UnitedStates, and a resident of the city, county, and State of New York, haveinvented certain new and useful Improvements in Stone-Sawing Machines,of which the following is afull, exact, and sufficient specification toenable any one skilled in the art to understand, construct, and operatethe same, reference being had to the accompanying drawings, wherein likeletters of reference indicate corresponding parts in the several views.

My improvements relate to a machine for sawing stone in blocks carriedby a truck in the usual way, by a reciprocating saw in a sash orcarrier, such reciprocation being limited to horizontal lines andproduced by ordinary appropriate mechanism connected with thedriving-power; and the object of such improvements is to obtain amachine simple in construction, effective in operation, and easilyadjustable, and to dispense with the usual lift and thrust movements andthe mechanism necessary therefor.

Figure 1 shows a side elevation of a machine embodying my improvements.Fig. 2 shows an end elevation, and Fig. 3 a plan, of the top thereof.Fig. l shows an enlarged perpendicular section of the adjustable axle.Fig. 5 shows an enlarged side elevation of the saw-blade carrier, andFig. 6 an end elevation thereof, and Fig. 7 is a horizontal sec-. tionof the same. Fig. 8 is an enlarged view of a portion thereof.

The sawing machinery is sustained by and contained in an outsidestationary frame of any preferred size and style, according tocircumstance of location and the judgment of themechanic. Such frameworkis indicated by the letter A, and in general will consist,substantially, of two pair of uprights connected at the top by cross andlongitudinal braces and beams. The motive machinery is such as iscommonly used to communicate a reciprocating motion and is connected tothe sash in any ordinary way by ordinary means. The sash consists of twocorresponding single uprights B 13, connected at the top by the broadlongitudinal brace-beam 0, made in a single casting, and ribbedandperforated for strength and lightness combined according to goodjudgment. The uprights themselves are preferably hollow and cast in theshape most clearly shown in horizontal section in Fig. 7, and in plan isessentially rectangular in form, with a recess or channel 1; runningfrom top to bottom on the face or front side and with a projectingshoulder or corner 0 on the back side. The recess or channel I) has atrack d, cut, as shown, in the side toward the front and running alsofrom top to bottom. The sash itself is sustained and reciproc'ates uponsuitable tracks D D in the usual way by rollers or wheels E E. The axleof these wheels is of novel construction and adj ustability, mostclearlyshown in Fig. 4, and consists simply of a short shaft 19, with reducedaxles q q for the wheels at each end, passing through a suitable hole inthe sash and fastened therein on each side thereof by a nut r screwingup against the side. These threaded parts of the adjustable axle are ofless diameter than the shaft itself and greater than that of the axles,as illustrated. It is obvious that by relaxing the nut on one side andscrewing up the other on the opposite side the sash may be movedcorrespondingly and desirable adjustments secured simply and easily.

The blade-carrier is of simple and novel construction, and consists inhorizontal section (shown in Fig. 7) of a right-angled plate I,embracing the corner made bythe front and back side of thesash-uprights. It has a central opening in the face in elevation (shownin Fig. 5) to admit the traveling Worm and its guide boxes, hereinafterdescribed. It has anti-friction rollers throughout its contact with thesash-uprights. In Fig. 7 two such rollers are shown, one 6 running inits track (Z in the perpendicular recess Z) and resisting the necessarytension of the saw-blade, and another f running against the projectingshoulder or corner c and resisting any departure from the uprights. Incertain situations and circumstances an additional roller similar inconstruction and situation might be advantageously applied against theback side of the corner 0 and assist the action of the roller 0. Theface of the blade-carrier is provided with suitable recesses and projecting lugs Z to receive and retain the sawbuckles and resist tension.

Fastened to the back of the recess or channel b is a rack h, and carriedin suitable boxes at the top and bottom of this perpendicular recess isthe shaft K, provided with a slot or keyway m throughout its length, andaround it travels the loose worm W, with a projecting key or feather Zworking in the keyway. This construction is shown clearly in theenlarged horizontal section of Fig. 8. The shafts K K have bevel-gears jj at the upper ends meshing at right angles with the bevel-gears m m onthe opposite ends of the horizontal shaft L. On the middle of this shaftis a long gear M equal in length to the stroke of the machine andreciprocating with the sash. With this long gear M the pinion N meshesin sliding contact and is fixed at one end of the shaft F. At theopposite end of this shaft is fastened the bevel-gear P, meshing withthe bevel-gear Q on the short shaft G. On one side or this short shaftand outside the frame is affixed the ratchet-wheel R, supported in asuitable box on a bracket. The rock-arm S,

pivoted midway between the two pawls T l,

is adjustably connected by a connecting-rod U with a short crank-arm onthe main shaft. Its purpose and operation are obvious.

What I claim as novel, useful, and of my in vention, is-

1. In a stone-sawing machine,'a saw-sash constructed of threepartsnamely, two rectangular hollow uprights or heads connected at thetop by a single deep brace, and combined with a saw-blade carried on oneside of the sash and movable thereupon, in the manner and for thepurpose substantially as specified.

2. In a stone-sawing machine, a saw-sash, together with a saw-bladecarrier consisting of a single right-angled plate embracing the backouter corner of the sash-upright, having suitable recesses and lugs forsaw-buckles, and provided with anti -friction rollers or equivalentmeans to prevent friction in movement up and down against the uprights,in combination with a stone-saw, all constructed and operatedsubstantially as specified.

3. A stone-sawing machine consisting of a saw-sash composed of twosingle rectangular uprights or heads opposite each other and connectedbetween their tops by a single deep brace, in combination with a stonesaw buckled in saw-blade carriers each consisting of a singleright-angled plate embracing the back outer corner of the sash uprightor head, and having anti-friction rollers between such contact, togetherwith means for raising and lowering such blade-carriers and saw-blade,all supported in suitable outside frame-work and ponstructed andoperated substantially as specified.

4. I11 a stone-sawing machine, a saw-sash constructed with hollowuprights orheads, each provided with projecting shoulder or corner andabutting recess, in combination with a saw-blade on one side of saidsash, substantially as specified.

5. In a stone-sawing machine, a saw-sash adjustable horizontally andtransversely to its length by means of shouldered axles sup porting thesash, and provided with reciprocally-adjnstable nuts on each side ofsuch sash, as and for the purpose substantially as specified.

6. In a stonesawing machine, for raising and lowering the blade on thesash, and in combination with each upright or head of such sash, aperpendicular revolving feedshaft provided with suitable keyway andloose worm, with a key or feather workingin such keyway, such wormmeshing with aperpendicular rack on the sash-upright, as and for thepurpose substantially as specified.

7. In a stone-sawing machine, in combination with and for operating theupright feedshafts by bevel-gears, a horizontal shaft provided with agear as broad as the length of the stroke of the saw, in slidingcontactand meshing with a pinion on another horizontal shaft parallelwith the first and operated through bevel-gears and a ratchet-wheel by arock-arm and two pawls connected to the crank-shaft, all combined andco-operating in the manner and for the purpose substantially asspecified.

8. In a stone-sawing machine, an upright saw-sash, combined with thesaw-blade carried on one side thereof and movable perpendicularlythereupon, substantially as specified.

THADDEUS A. JACKSON.

WVitnesses:

PHILIP P. OLARKIN, EDMUND D. I'IENNESSY.

